1. From the University of Maryland Greenebaum Cancer Center, Baltimore, MD; Roswell Park Cancer Institute, Buffalo; North Shore University Hospital, Manhasset, NY; CALGB Statistical Center, Duke University Medical Center, Durham, NC; The Ohio State University Medical Center, Columbus, OH; Comprehensive Cancer Center of Wake Forest University, Winston-Salem; Duke University Medical Center, Durham, NC; Dana-Farber Cancer Institute, Boston, MA; and University of Chicago, Chicago, IL